| Reid Spencer | f31918b | 2005-05-03 00:52:19 +0000 | [diff] [blame] | 1 | ; Test that the StrNCmpOptimizer works correctly |
| Dan Gohman | f2f6ce6 | 2009-09-11 18:01:28 +0000 | [diff] [blame] | 2 | ; RUN: opt < %s -simplify-libcalls -S | \ |
| Reid Spencer | 43b4003 | 2007-04-16 15:31:49 +0000 | [diff] [blame] | 3 | ; RUN: not grep {call.*strncmp} |
| Reid Spencer | d2db880 | 2005-05-03 00:50:43 +0000 | [diff] [blame] | 4 | |
| Benjamin Kramer | ea9ca02 | 2010-06-16 10:30:29 +0000 | [diff] [blame^] | 5 | target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32" |
| 6 | target triple = "i386-apple-darwin9.0" |
| 7 | |
| Tanya Lattner | ceca194 | 2008-03-10 07:21:50 +0000 | [diff] [blame] | 8 | @hello = constant [6 x i8] c"hello\00" ; <[6 x i8]*> [#uses=1] |
| 9 | @hell = constant [5 x i8] c"hell\00" ; <[5 x i8]*> [#uses=1] |
| 10 | @null = constant [1 x i8] zeroinitializer ; <[1 x i8]*> [#uses=1] |
| Reid Spencer | d2db880 | 2005-05-03 00:50:43 +0000 | [diff] [blame] | 11 | |
| Tanya Lattner | ceca194 | 2008-03-10 07:21:50 +0000 | [diff] [blame] | 12 | declare i32 @strncmp(i8*, i8*, i32) |
| Reid Spencer | d2db880 | 2005-05-03 00:50:43 +0000 | [diff] [blame] | 13 | |
| Tanya Lattner | ceca194 | 2008-03-10 07:21:50 +0000 | [diff] [blame] | 14 | declare i32 @puts(i8*) |
| 15 | |
| 16 | define i32 @main() { |
| 17 | %hello_p = getelementptr [6 x i8]* @hello, i32 0, i32 0 ; <i8*> [#uses=5] |
| 18 | %hell_p = getelementptr [5 x i8]* @hell, i32 0, i32 0 ; <i8*> [#uses=1] |
| 19 | %null_p = getelementptr [1 x i8]* @null, i32 0, i32 0 ; <i8*> [#uses=4] |
| 20 | %temp1 = call i32 @strncmp( i8* %hello_p, i8* %hello_p, i32 5 ) ; <i32> [#uses=1] |
| 21 | %temp2 = call i32 @strncmp( i8* %null_p, i8* %null_p, i32 0 ) ; <i32> [#uses=1] |
| 22 | %temp3 = call i32 @strncmp( i8* %hello_p, i8* %null_p, i32 0 ) ; <i32> [#uses=1] |
| 23 | %temp4 = call i32 @strncmp( i8* %null_p, i8* %hello_p, i32 0 ) ; <i32> [#uses=1] |
| 24 | %temp5 = call i32 @strncmp( i8* %hell_p, i8* %hello_p, i32 4 ) ; <i32> [#uses=1] |
| 25 | %rslt1 = add i32 %temp1, %temp2 ; <i32> [#uses=1] |
| 26 | %rslt2 = add i32 %rslt1, %temp3 ; <i32> [#uses=1] |
| 27 | %rslt3 = add i32 %rslt2, %temp4 ; <i32> [#uses=1] |
| 28 | %rslt4 = add i32 %rslt3, %temp5 ; <i32> [#uses=1] |
| 29 | ret i32 %rslt4 |
| Reid Spencer | d2db880 | 2005-05-03 00:50:43 +0000 | [diff] [blame] | 30 | } |
| Tanya Lattner | ceca194 | 2008-03-10 07:21:50 +0000 | [diff] [blame] | 31 | |
| Benjamin Kramer | ea9ca02 | 2010-06-16 10:30:29 +0000 | [diff] [blame^] | 32 | define i32 @test1(i8* %P, i8* %Q) { |
| 33 | %cmp = call i32 @strncmp(i8* %P, i8* %Q, i32 1) |
| 34 | ret i32 %cmp |
| 35 | } |